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package org.netbeans.modules.javafx.fxd.composer.editor;

import com.sun.javafx.tools.fxd.container.scene.fxd.FXDSyntaxErrorException;
import java.util.ArrayList;
import java.util.List;
import javax.swing.text.BadLocationException;
import javax.swing.text.Document;
import org.netbeans.editor.BaseDocument;
import org.netbeans.editor.Utilities;
import org.netbeans.modules.editor.indent.api.IndentUtils;
import org.netbeans.modules.javafx.fxd.composer.source.FXDDocumentModelProvider;
import org.netbeans.modules.parsing.spi.Parser.Result;
import org.netbeans.modules.parsing.spi.ParserResultTask;
import org.netbeans.modules.parsing.spi.Scheduler;
import org.netbeans.modules.parsing.spi.SchedulerEvent;
import org.netbeans.spi.editor.hints.ErrorDescription;
import org.netbeans.spi.editor.hints.ErrorDescriptionFactory;
import org.netbeans.spi.editor.hints.HintsController;
import org.netbeans.spi.editor.hints.Severity;
import org.openide.util.Exceptions;
import org.openide.util.NbBundle;


/**
 *
 * @author Andrey Korostelev
 */
public class SyntaxErrorsHighlightingTask extends ParserResultTask {

    private static final String MSG_ERROR = "MSG_ERROR"; // NOI18N

    public SyntaxErrorsHighlightingTask() {
    }

    @Override
    public void run(Result result, SchedulerEvent event) {
        try {
            Document document = result.getSnapshot().getSource().getDocument(false);
            if(document == null){
                return;
            }
            Object prop = document.getProperty(FXDDocumentModelProvider.PROP_PARSE_ERROR_LIST);
            List<FXDSyntaxErrorException> syntaxErrors = (List<FXDSyntaxErrorException>)prop;
            if (syntaxErrors == null){
                return;
            }

            List<ErrorDescription> errors = new ArrayList<ErrorDescription>();
            for (FXDSyntaxErrorException syntaxError : syntaxErrors) {
                int ErrRow = getRow(syntaxError, (BaseDocument) document);
                int ErrPosition = getPosition(syntaxError, (BaseDocument) document);

                // 174091
                ErrorDescription errorDescription = ErrorDescriptionFactory.createErrorDescription(
                        Severity.ERROR,
                        NbBundle.getMessage(SyntaxErrorsHighlightingTask.class,
                                MSG_ERROR, syntaxError.getLocalizedMessage(), ErrRow, ErrPosition),
                        document,
                        ErrRow);
                errors.add(errorDescription);
            }
            if (document != null) {
                HintsController.setErrors(document, "simple-java", errors); //NOI18N
            }
        } catch (BadLocationException ex1) {
            Exceptions.printStackTrace(ex1);
        }
    }

    public static int getRow(FXDSyntaxErrorException syntaxError, BaseDocument document)
            throws BadLocationException {
        return Utilities.getRowCount(document, 0, syntaxError.getOffset());
    }

    public static int getPosition(FXDSyntaxErrorException syntaxError, BaseDocument document)
            throws BadLocationException {
        int offset = syntaxError.getOffset();
        if (offset > -1 && offset < document.getLength()) {
            int rowStart = Utilities.getRowStart((BaseDocument) document, offset);
            int position = offset - rowStart;
            int tabs = syntaxError.getTabsInLastRow();
            if (tabs > 0) {
                // replace 1 tab char by number of spaces in tab
                position = position - tabs + (tabs * IndentUtils.tabSize(document));
            }
            return position;
        }
        return 0;
    }


    @Override
    public int getPriority() {
        return 100;
    }

    @Override
    public Class<? extends Scheduler> getSchedulerClass() {
        return Scheduler.EDITOR_SENSITIVE_TASK_SCHEDULER;
    }

    @Override
    public void cancel() {
    }
}
